template specification oddness

From:

Matthias Buelow <mkb@incubus.de>

Newsgroups:

comp.lang.c++

Date:

Thu, 21 Feb 2008 20:06:58 +0100

Message-ID:

<6260ejF2228buU1@mid.dfncis.de>

Hi folks,

I have a weird problem that I can't seem to put my finger on. The
following example program illustrates it:

----------------------------------------------------------------------
using namespace std;

template<typename Tval, typename Targ> struct Closure {
    virtual Tval f(Targ arg) = 0;
    virtual ~Closure() = 0;
    // add environment by subclassing
};

#include <list>

template<typename Targ> struct Hooks {
    std::list<Closure<void, Targ> *> hooks;

    void AddHook(Closure<void, Targ> *cl) { hooks.push_front(cl); }
    void RemoveHook(Closure<void, Targ> *cl) { hooks.remove(cl); }
    void RunHooks(Targ arg) {
        std::list<Closure<void, Targ> *>::const_iterator i = hooks.begin();
        for (; i != hooks.end(); i++)
            (*i)->f(arg);
    }
};

int main()
{
    Hooks<bool> h;

    return 0;
}
----------------------------------------------------------------------

When compiling this, g++ (g++ (GCC) 4.1.2 20061115 (prerelease)
(Debian 4.1.1-21)) gives the following error:

t.cc: In member function 'void Hooks<Targ>::RunHooks(Targ)':
t.cc:17: error: expected `;' before 'i'
t.cc:18: error: 'i' was not declared in this scope

The Intel compiler, however, compiles it without error (icpc (ICC) 10.1
20070913).

Which compiler is right? Is it a g++ bug?

Thanks.